E 11 High
Your boiler is unable to control the gas flow properly because of a communication fault between its brain and the gas valve.
Technical description: Gas valve modulator connection is broken – could be due to an internal failure.
Typical repair cost: £180-£350 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E 11 — no call-out fees, no surprises.
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Parts commonly replaced
- Gas Valve
- Wiring Harness
- Main Control Board (PCB)
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